I have installed rpc over https and it is working fine. However I have one outlook 2003 client that will not work. I uninstalled Norton firewall disabled sp2 firewall. Still no go. I also notice on event viewer on Domain controller and Exchange server I see successful login just like other clients. I even matched settings side by side with working client yet no go any one out there run into this and have a fix. Thanks Jeff _______________________________________ Jeff Bushberg Network Consultant CBC Systems 5274 Scotts Valley Dr. suite 105 Scotts Valley Ca 831-438-8688 E-mail: jeff@xxxxxxxxx Website: www.cbc4u.com <http://www.cbc4u.com/>